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REXROTH Pressure Limiting Valve DBDH6G1X/400, the main product of Shanghai Weimi Mechanical & Electrical Equipment Co., Ltd. Sales hotline: 13524123009; Contact person: Lei Qing; Product actual shot pictures, original genuine products, in-stock inventory, affordable price; Warmly welcome new and old customers to consult and purchase!
Rexroth Pressure Limiting Valve, Direct Control DBD Series
Specification 6 … 30
Component Series 1X
Maximum Working Pressure 630 bar
Maximum Flow 350 l/min
Used as Screw-in Cartridge Valve (Insert)
For Threaded Connection
For Base Plate Mounting
Adjustment Types for Pressure Adjustment, Optional:
- Hexagon Socket and Protective Cap
- Knob
- Handwheel
- Lockable Knob
Anti-corrosion Design
The DBD Type Relief Valve is a Direct-acting Seat Valve. These valves are used to limit the system pressure.
These valves are mainly composed of the following components: Sleeve, Spring, Valve Core with Damping Plunger (Pressure Rating 25 bar … 400 bar) or Ball (Pressure Rating 630 bar) and Adjustment Type. The system pressure can be steplessly adjusted using the Adjustment Type. The spring pushes the valve core or ball onto the valve seat. Channel P is connected to the system. The pressure existing in the system will act on the valve core surface (or ball). If the pressure in Channel P exceeds the value set on the spring, the valve core or ball will open against the spring. At this time, the hydraulic oil flows from Channel P into Channel T. The stroke of the valve core is limited by the knurling.
In order to achieve good pressure adjustment over the entire pressure range, the entire pressure range has been divided into 7 pressure ratings. One pressure rating corresponds to the maximum working pressure that a specific spring can set.
Note:
The Adjustment Type is specially constructed to prevent its loss. Thanks to the gimbal design, the adjustment element in the Adjustment Type will remain loose (movable) after complete unloading.
Pressure Rating "25": Even though the Adjustment Type is in the fully unloaded state, if the minimum pressure is not determined, the adjustment element will still "return" to the stop state under the action of a small spring force and/or restoring force.
After pressure adjustment/boosting, the adjustment element can be screwed in again.
Ordering Model of German Rexroth REXROTH Relief Valve:
R900427242 DBDH6P1X/200
R900423718 DBDS6G1X/25
R900423722 DBDS6G1X/50
R900433216 DBDS6G1X/315V
R900769384 DBDS6K1C/200E
R900423730 DBDS6P1X/315
R900424745 DBDS10G1X/50
R900424158 DBDS10P1A/315
R900424157 DBDS10P1X/200
R900424158 DBDS10P1X/315
R900425660 DBDS10P1X/400
R900424271 DBDS20K1X/315
R900746472 DBDS30G1A/200-170
R900424348 DBDH6G1X/400
Rexroth valve amplifier for high-frequency response valves
VT-VRPA2-537-1X/V0/RTP
VT-VRPA2-537-10/V0/RTP 0811405120
Component series 1X
Analog, European board format
Suitable for the following types of valves: 4WRP 10
Final stage for closed-loop control
Closed-loop position control with PID characteristics
Fast excitation and fast power-off with short drive time
Gating input
Short-circuit protection output
Adjustable ramp time, sensitivity and zero potential
Cable break identification for the actual value cable
Rexroth valve amplifier for proportional pressure valves and proportional flow control valves
VT-MSPA1-508-1X/V0
0811405126 VT-MSPA1-508-10/V0
Component series 1X
Analog, modular design
Suitable valves:
DBETX-1X...-8, DRE10Z-1X...-8, DRE6X-1X...-8, DBE6X...1X...-8, DBE10Z-1X...-8
Features
Suitable for controlling direct-acting proportional valves without electrical feedback
Design: Module for snap-on mounting on carrier rails
Differential input for control value voltage 0...+10 V
The up-ramp and down-ramp on the ramp function generator can be set separately
Zero potentiometer
Pulse modulation output stage
LED display:
Power supply voltage
Ready
Ramp "off"
Detachable electrical terminal block
Rexroth valve amplifier for proportional pressure valves and proportional flow control valves
VT-SSPA1-508-2X
0811405144 VT-SSPA1-508-22/V0
0811405162 VT-SSPA1-508-22/V0/I
Component series 2X
Analog, connector design
Applicable valves:
DBETX-1X...-8, DRE10Z-1X...-8, DRE6X-1X...-8, DBE6X...1X...-8, DBE10Z-1X...-8
Differential input
Adjustable ramp time, sensitivity, zero potential and dither frequency
24 V operating voltage
The amplifier is used to control proportional valves without electrical position control.
It is directly connected to the coil plug of the valve. The connection cable on the control side (UB, control value) is guided and connected through the cable bundle coil.
The LED signals the available power supply voltage. Depending on the amplifier type, the control value is preset to a voltage of 0...10 V or a current of 4...20 mA.
The control value can be adjusted through the valve zero potentiometer and the sensitivity potentiometer. In the case of voltage specifications, a differential input can be used.
In addition, the control value can be guided through a ramp.
To adapt to special applications, the dither current amplitude potentiometer has a variable design.
Upon delivery, the dither current amplitude potentiometer is set to the optimum value, so that another adjustment is only necessary in the above special cases.
Rexroth board slot
VT 3002-2X
The board slot can be used for the easy installation and wiring of European-style electronic boards in the European format, such as in electrical cabinets
It can be fixed with screws or on a top-hat rail
An additional adapter can be used to install it in the vertical position on the top-hat rail (included in the delivery scope)
Steady-state basis
Locking and ejecting with a control lever
Connection through screw terminals
Rexroth REXROTH external control electronic components for the SYDFE1 control of A10VSO axial piston variable pumps
VT 5041
R901263598 VT5041-31/2-0
Component series 3X
Analog, European board format
The built-in part of the pressure and flow control system SYDFE1 (component series 1X, 2X and 3X) is used to control the axial piston variable pump A10VSO with SYDFE1 control through the VT-DFP…2X type valve...
Realize the electronic functions of SYDFE1 control, pressure and swing angle control, and optional power limitation
The oil circuit of the pressure controller can be adjusted and switched to two existing hydraulic oil volumes (actuators and pipelines)
Small value generator for pressure and angle controllers
Pressure-dependent leakage compensation (can be turned off)
Convertible pressure feedback input (current, voltage, range)
6 LED displays of the working status on the panel
Display instrument for the actual angle value on the panel (optional)
Power limitation with internal or external control value preset (optional)
The analog control electronic component VT5041-3X... is designed as an insertion card in European format. Each is standard equipped with a control value input terminal for pressure and angle (power limitation, optional). The actual pressure value is recorded by a pressure sensor. The position sensor on the pump records the actual angle value. The recorded actual values are processed in the amplifier and compared with the control values. The small value generator ensures that only the controller assigned to the required operating point is automatically activated. The output signal of the small value generator becomes the control value of the valve control loop.
With appropriate control values, the optional power limitation can be automatically activated. The power control value can be set internally or externally. If necessary, the angle control value is limited by the small value generator. The obtained angle control value can be measured at socket 7.
The actual valve value (spool position) is recorded by an inductive position sensor. The oscillator/demodulator circuit is responsible for signal processing. The control deviation is generated and further processed in the spool position controller. The output signal of the valve controller forms the control value of the self-timing current output stage, which controls the proportional coil of the valve.
The control electronic component has a fault message output terminal. When an error occurs, its voltage is 0 V (= low activity). At the same time, the "Err." LED lights up. According to the configuration of jumper J1, the valve output stage can be powered off using the error message.
Causes of fault messages:
Internal power supply error
The actual pressure value is greater than the allowable system pressure
(Socket 2: p actual > 11.5 V)
Missing enable signal on interface 26c
Cable break or out of corner feedback range
Cable break or out of spool feedback range
"Pressure sensor" cable break (when set to 4 - 20 mA, 0.5 - 5 V and 1 - 10 V)
The time when the control error (control deviation x controller gain) is greater than 4 V exceeds 1 second (40 %)
When an error occurs, the electronic components can be configured to cut off the power of the output stage and push the spool into its mechanical end position. In this way, the pump will swing back. The error can only be confirmed by resetting the enable signal.
Rexroth power supply module
Types VT 11006, VT 11116
The power supply module provides two stable voltages. It is used to supply power to external electrical actuators.
VT 11006-1X: 24 V / ±15 V
VT 11116-1X: 24 V / ±10 V
Switching mode power supply equipment
Voltage reverse polarity protection
Function control displayed by LED
The output voltage is electrically isolated from the operating voltage
Precautions
The power supply module cannot resist continuous short circuits!
When one output voltage is overloaded, the second output voltage will also decrease!
When multiple adjacent modules are running continuously and the temperature is higher than 40 °C, the space between the modules must be kept ≥ 20 mm!
Rexroth valve amplifier for proportional valves without electrical position feedback
VT-MSPA
R901439034 VT-MSPA1-20/A5/000/000
R901439037 VT-MSPA2-20/A5/000/000
Component series 2X
Suitable for controlling proportional valves and pump control elements without electrical position feedback
Multiple Rexroth industrial hydraulic valves are available
The characteristic curves of the valves stored in the device
Optimize the valve through the button
Control value input 0 ... ±10 V or 4 ... 20 mA
Reverse polarity protection of the operating voltage
The up-ramp and down-ramp on the ramp generator can be adjusted separately
Zero potential setting
Control value adjustment
Characteristic curve generator
Timed power output stage
Short-circuit protection output
LED status display
Measurement sockets are suitable for: Actual current value, internal current control/setting
All valve parameters can be adjusted
General information
These amplifier modules are suitable for mounting on top-hat rails. Electrical connections are established through 3 tension spring plugs. The power supply voltage is 24 VDC.
Power supply equipment
The internal power supply equipment is equipped with an inrush current limiter to prevent current peaks. In addition, reverse polarity protection function is also integrated.
Control value, control value adder
"Internal control value" includes:
"External control value", connected to the input of the differential amplifier (2)
Zero offset, "Z/B" in the standard setting is adjustable
In the pressure valve, a positive control value will increase the pressure at the valve.
For valves of type 4W...1), the following applies:
Through coil B, a control value of 0 - +10 V or 12 - 20 mA makes the fluid in the valve flow from P to A and from B to T.
Through coil A, a control value of 0 - -10 V or 12 - 4 mA makes the fluid in the valve flow from P to B and from A to T. In the expert setting, it is possible to change the polarity of the control value [5] (please refer to the operating instructions 30232-B).
During normal operation, the "internal control value" can be measured at the "V" measurement socket.
Ramp
The ramp limits the slope of the control value.
You can choose between a single ramp (all ramps have the same time, default value) and a 4Q/2Q ramp (the ramp times are different). The 4Q/2Q ramp times are set in the expert setting. The characteristic curve generator does not affect the ramp time.
Control value attenuator "G"
The control value can be reduced by using the control value attenuator.
Characteristic curve generator
In the characteristic curve generator, the preset valve characteristic curve can be adjusted to the actual hydraulic and control technology conditions.
The following can be adjusted in the expert setting:
Pilot current "B"
Step "S"
High current "G" (VT-MSPA2 can be used for A and B respectively)
Current controller
The coil current will be recorded and compared with the control value in the current controller, and then the difference will be compensated.
Clock generator
The clock generator generates the clock frequency "f" of the output stage. When using Rexroth valves, the clock frequency sometimes varies with the control value and/or the operating voltage.
Power output stage
The current output stage generates the timed coil current for the proportional valve. The coil current is limited to
The maximum allowable current for each output, depending on the set valve. The output stage is designed to be short-circuit proof. The output stage will turn off if there is an internal interference signal or the enable signal is missing.
Digital input
The input DI can be set to four different functions:
1. Enable (factory setting)
2. VT - MSPA1 1) Without function
2. VT - MSPA2 Control value polarity change
3. Ramp on/off
4. Single or phase ramp
Digital output
If there is no cable interruption, internal error, and UB ≥ UB min, the device will indicate readiness.
Valve type 4WRPH6…SO855, switch positions 0 - 5:
Control value ±10 V
Digital input 2, control value polarity change
REXROTH pressure limiting valve DBDH6G1X/400
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